46results about How to "Meet fire resistance requirements" patented technology

The invention discloses a decorative fireproof and soundproof door which is composed of a door frame, a door leaf, a soundproof door lock structure, fireproof sealing rubber strips, hinges and an automatic door bottom sealing soundproof structure. The soundproof door lock structure is composed of a three-rod handling lock and a lock soundproof structure. The fireproof sealing rubber strips are composed of composite fireproof semi-D-shaped sealing strips arranged in the L-shaped bent corners of the door frame, L-shaped fireproof sealing rubber strips arranged in the L-shaped bent corners of the door leaf, and cladding type fireproof sealing strips arranged between the hinges. The lock soundproof structure is composed of a front circular pipe sleeve and a rear circular pipe sleeve of a square pipe steel latch for twisting a spring bolt, a circular pipe sleeve of an installation rod, a steel box of a protective sleeve of the spring bolt, and fireproof and soundproof materials with which a cavity is filled. The lock soundproof structure is installed at the installation position of the three-rod handling lock in a door leaf compression forming steel plate. The decorative fireproof and soundproof door meets strict fireproof indexes, has the higher soundproof effect, and has the good decorative feature.

The invention discloses a preparation method for polystyrene with high flame retardant property and a prepared polystyrene material. Hypophosphite and phenyl phosphinates which serve as halogen-free environment-friendly solid flame retardants and a halogen-free liquid flame retardant are adopted to prepare a composite flame retardant which works on the polystyrene material. The preparation method for the polystyrene material comprises the steps of feeding a dispersing agent, an emulsifier, an initiator and styrene into a high-pressure polymerization kettle to generate reaction, and adding the composite flame retardant after a certain conversion rate is achieved; adding a foaming agent after particles are hardened; closing the reaction kettle, heating the reaction kettle, preserving the temperature, and washing and drying to obtain material ball particles; foaming the material ball particles, curing foamed balls under room temperature, and putting the foamed balls into a mold to obtain the polystyrene material with high flame retardant property. According to the preparation method and the polystyrene material, the halogen-free environment-friendly solid flame retardants and the halogen-free liquid flame retardant are mixed; the solid phase flame retardants are uniformly dispersed in the liquid phase flame retardant to achieve a synergistic flame retardant effect; the flame retardant performance of the polystyrene material is realized, and various excellent properties of the polystyrene are kept.

The invention discloses a preparation method of a light refractory plate, belonging to the field of the refractory material. The preparation method comprises the following steps: using talcum powder, bauxite powder and clay powder as main raw materials to mix evenly in advance, then adding expansion glazed hollow beads to mix evenly, placing the final mixture in a mixer, adding water to stir, shaping, drying, and firing at 1400-1600 DEG C. The added glazed hollow beads can meet the refractory requirement and also effectively achieve the aim of reducing the weight. The method can be widely used in the fields such as architecture, metallurgy and chemical engineering.

The present invention provides a rail crossing fire shutter and a construction method thereof. The fire shutter includes: a fire shutter door set at the passage opening opened on the fire barrier, and a threshold set on the ground directly below the fire shutter door; the threshold is set at the position where the rail passes through with the width of the passage of the vehicle. Corresponding gaps are provided with fireproof expansion sealing strips in the gaps. In the present invention, a threshold is installed on the ground directly below the fire shutter door, and a gap corresponding to the passage width of the transportation means is set at the position where the rail passes on the threshold, and a fire expansion sealing strip is arranged in the gap, so that the rail transported The passing width is limited to the expansion range of the fire-proof expansion sealing strip, and it also makes an effective supplement to the fire-proof sealing performance of the fire-proof rolling shutter door, meeting the fire-resistance limit requirements of the fire-proof barrier and meeting its fire-proof, heat-insulation and smoke-proof requirements.

The invention discloses high-flame retardant rigid polyurethane foaming plastic and a preparation method thereof. The preparation method comprises the following steps: evenly mixing polyol, a compound flame retardant, a foaming agent, a foam stabilizer and a catalyst to prepare a polyurethane composition A; controlling the material temperature and mould temperature, adding isocyanate into A, and stirring evenly; and pouring the evenly mixed liquid into a mould for foaming to obtain the high-flame retardant rigid polyurethane foaming plastic after foaming and curing. According to the high-flame retardant rigid polyurethane foaming plastic and the preparation method, halogen-free environment-friendly solid flame retardant aluminum hypophosphite, phenyl aluminum hypophosphite, and halogen-free liquid flame retardant dimethyl methylphosphonate are adopted for being compounded with cyclic phosphonate flame retardant to replace a conventional halogen-containing flame retardant, and a dispersant is adopted for enabling the solid-phase flame retardant to be evenly dispersed in the liquid-phase flame retardant, so as to achieve the effect of efficient synergistic flame retardance, effectively solve the problem that ordinary rigid polyurethane foam plastic is poor in flame retardance, meanwhile also maintain various superior performances of PU (Polyurethane) rigid foam.

A ceramic core board of a fireproof door comprises a base board, wherein the base board is a foaming cement base board, reinforcing layers are arranged on two sides of the foaming cement base board and are formed by mesh reinforcement and burn-free ceramic coverings, and the mesh reinforcement is gridding cloth. The ceramic core board of the fireproof door has the advantages of light weight, high strength, waterproofing, fireproofing, small heat conductivity coefficient, no deformation, no efflorescence, good sound insulation effect, low cost and the like and is an upgrade product of an existing core board of the fireproof door.

The invention discloses a fire-resistant rock wool board and a preparing method thereof. Fe2O3 accounts for 13% to 18% of the total mass of the rock wool board, and Al2O3 accounts for 12% to 15% of the total mass of the rock wool board. The method includes the steps that the rock wool board is prepared from, by mass, 60-70 parts of basalt, 10-20 parts of dolomite, 10-20 parts of hematite and 5-10 parts of bauxite, all the raw materials are mixed to be even and put into an electric furnace through an input belt and melted at the high temperature of 1,500 DEG C to 1,800 DEG C into slurry, fibers are formed through a four-roller centrifugal machine in a high-speed mode, the rock wool fibers are collected, solidified and formed, and the rock wool board is prepared. The fire resistance duration of the rock wool board is larger than or equal to 2.0 h, and the fire-resistant rock wool board can be widely used for building-interlayer-structure fire-resistant sealing.